I want to upgrade to essentials package, I am on the 30 day trial but when I hit subscribe it only gives me the option to the plus package

When subscribing to QuickBooks Online (QBO) for the first time from a free-trial account, if Plus is the only package appearing, it's because there are features enabled that are only available to Plus users. By disabling these features, you'll be able to subscribe to Essentials without issue. These features are listed in the QBO version comparison chart for your convenience. I'll guide you through disabling each of these features below:

Disable Inventory and Purchase Orders

Click the Gear icon (⚙) and select Account and Settings.

Select the Sales tab and click on Track inventory quantity on hand.

Uncheck the box, click Save and then Done.

Disable Class and Location Tracking

Click the Gear icon (⚙) and select Account and Settings.

Select the Advanced tab and click on Categories.

Uncheck both the Track classes and Track locations.

Remove Excess Users

Click the Gear icon (⚙) and select Manage Users.

QBO Essentials is limited to three (3) paid users, so any users in excess of this will need to be removed.

Click the dropdown (▼) next to Edit and select Delete for each of these users.

Once all of these features are disabled, you can subscribe to whichever package you'd like. All of this information and more is available from our awesome guide on downgrading QuickBooks Online. Please keep in touch with me here if there's anything else I can do to help you succeed. Thanks for coming to the Community and take care.